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Epoxy resin coating can not only prevent metal from direct contact with food, avoid metal corrosion or contamination of food, but also extend the shelf life of food. Therefore, the inner wall coating of many food and beverage cans contains BPA.

It does not react like other metals when it encounters water or acid, and can provide stronger corrosion resistance for packaging cans. At the same time, the surface of tin is smooth, odorless, and non-toxic, and will not affect the taste and quality of the food inside the package.

Process of tinplate sheet tinning: 1. Pretreatment of steel sheet ● Degreasing treatment ● Pickling ● Surface activation 2. Process of electroplating tin ● Setting of electrolytic cell ● Applying current ● Control of coating thickness 3. Post-treatment process ● Passivation treatment ● Oiling

Tinplate products in food packaging: 1. Tinplate packaging in canned food ● Canned food ● Canned soup and liquid food ● Canned high-acid food 2. Tinplate products in beverage packaging ● Metal beverage cans ● Tea cans and coffee cans 3. Tinplate products in candy and snack packaging ● Candy boxes ● Biscuit and cake cans ● Potato chip cans 4. Tinplate products in dairy and milk powder packaging ● Milk powder cans ● Dairy packaging cans 5. Tinplate packaging for condiments and oily foods ● Condiment cans ● Edible oil packaging cans

Tinplate is actually a composite material, its core part is low-carbon steel plate, and the surface is plated with a thin layer of tin. Therefore, tinplate is mainly composed of two materials: steel plate (iron) and tin.

The main advantages of tin can packaging: Excellent protective performance Excellent sealing Good plasticity and diversity Environmental protection and recyclability Anti-tampering and authenticity functions The main disadvantages of tin can packaging: Heavy weight High production cost Easy to rust Difficult processing Poor transparency

The main component of tinplate cans is steel, on which a thin layer of tin is coated to prevent rust and corrosion. Aluminum cans are made entirely of aluminum, a lightweight metal with a density of about one-third that of steel.

The tinplate layer on the surface of tinplate sheet has good chemical stability and usually does not react chemically with food or beverages. This is because tin has extremely low reactivity at room temperature and is not easy to react with acids and alkalis, so it is widely used in food packaging.

Tinplate containers, in simple terms, are packaging or storage containers of various shapes made of tinplate. This type of container is made of tinplate as the main material and is made through a series of stamping, cutting, welding and forming processes.

Reasons why tinplate sheet can be used as food packaging material: 1. Anti-corrosion performance 2. Mechanical strength and durability 3. Good sealing 4. Food safety 5. Good processability and decorativeness 6. Recyclable and environmentally friendly characteristics